01 - Preheat oven to 350°F and line two large baking sheets with parchment paper.
02 - In a large mixing bowl, blend softened butter, granulated sugar, and brown sugar with an electric mixer until mixture is light and fluffy.
03 - Beat in creamy peanut butter, followed by adding eggs one at a time, mixing thoroughly after each addition. Stir in vanilla extract.
04 - In a separate bowl, whisk together the oats, all-purpose flour, baking soda, and salt.
05 - Gradually add the dry mixture to the wet ingredients, mixing just until combined; do not overmix.
06 - Gently fold in the red, white, and blue chocolate candies, semisweet chocolate chips, and mini pretzels if using.
07 - Scoop rounded tablespoons of dough onto the prepared baking sheets, ensuring a two-inch gap between each portion.
08 - Bake for 10 to 12 minutes, until the edges are golden while the centers remain soft.
09 - Allow cookies to cool on baking sheets for five minutes before transferring to a wire rack to cool completely.